Control for heating devices



Feb. 19, 1929.

M; KOHN CONTROL FOR HEATING DEVICES Filed Aug, 24, 1925 itllllli-lifilllllllllllllllH ATTORN EY Patented Feb. 19 1929;

UNITED STATES MILTON M. KO HN, OF NEW YORK, N. Y.

CONTROL FOR HEATING DEVICES.

Application filed August 24, 1926. Serial No. 131,207.

This invention relates to controlling mechanism operated either by weight of position of hand holding a tool or other appliance and also for heating devices in which the article to be heated directly actuates the heating means by its weight and shape.

The device for the purpose of illustration is shown as applied toa Well known type of gas burner, used to obtain a high temperature, but it is not to be understood as being limited to this type of burners, as many other kinds of heaters can be used, the heating means not being the essential feature, but rather the control means therefor. will be understood that while a gas burner is shown, electrical, steam, hot air, water and other heating means may be used, modified mechanisms being accordingly employed.

If electricity is used, it might be found desirable to use a relay actuated by the weight of a hand or the object itself to be heated. If any form of liquid be used, a valve would be directly or indirectly actuated by such 7 weight.

For cooking or other household work using, either gas directly or indirectly, or hot water, etc., the weight of the article itself controls the heat.

In many of the arts heating devices are in common use and almost invariably such use is intermittent rather than steadily continuous, the intervals of actual disuse exceeding the periods of performance; nevertheless the control mechanism is seldom or never closed, or even diminished except at the endof the day, the result being a raised temperature in the workroom or laboratory and a useless waste of fuel.

It is therefore one of the objects of the present invention to provide a heating device with means to close its fuel valve automatically and instantly upon removal of the work part from the heating element, and to reopen the valve upon positioning a work-part to receive heat.

A further feature is in the provision of a shield or anti-choke device carried by a support and arranged with reference to the top of the heater so as to prevent particles of matter, melted or otherwise, from obstructing the burner opening in any manner.

Another aim is to produce a burner having a drip collector preventing clogging of the supply pipe leading to the burner.

A still further characteristic is to provide For this reason itmeans to hold the work parts in an easily accessible position.

These and other important objects, which will later appear, are accomplished by the novel and practical device hereinafter described in detail and illustrated in the drawing'constituting a component hereof and in which Figure l is a plan View of an embodiment of the device illustrating its application. 7

. 'Figure 2 is a side elevational view of the same, showing its operative position in broken lines and its raised position in full lines.

Figure 3 is a similar view showing a workpart holding device attached to the control ever.

Figure 4 is a sectional View of a preferred form of a burner having drip collecting means.

In the drawing, the numeral 10 generally designates a platform on which is a burner base 11 having a tubular inlet nozzle 12 over which may be placed any preferred flexible tube leading to a supply of gas.

The inner end of the base 11 is connected with an upright burner tube 13 having near its lower end, a control cock 14 actuated by a lever 15 of rectangular cross section formed in two portions jointed at 15 about the center of its length, permitting the outer portion to swing sidewise when desired, accommodating the position of the hand of an operator, rendering the operation convenient and confortable; the inner portion of the lever passes through a spilt or slotted hollow post 16 fixed to the platform 10 and containing an expansion spring 17 intermediate the lever 15 and the platform, a cap 18 being engaged at the top of the post to limit the rise of the lever against the action of the spring. 7

Connected to the burner tube 13, below the valve cook 14, is a thin pipe'19 having a needle valve 20to control the flow of gas to a pilot light 21 fixed at the upper end of the pipe curved adj acently inward towards the burner.

Fixed on the tube 13 is a burner 22 having its open end covered with a finely meshed wire gauze to keep the tube free from obstruc tions andalso from back firing.

Carried by the burner is adome 23 adapted to cause a draught, thoroughly mixingatmospheric air with the gas, hence supplying an intensely hot flame.

Secured to the top of the pilot pipe 19, in

register with the opening in the burner, is a small double coned element 24, having a flaring portion larger in diameter than the burn er tube so that melted material, as wax, dropping from above, will be deflected from the burner, thus preventing choking it and still not affecting the size or shape of the flame.

Fixed to the burner 13 is a circular pan 25 adapted to hold material and also receive any drippings that may occur during the heating of a work-part.

Attachable to the side wall of the pan 25 is a curved wind shield 26 to protect the flame from draughts, if the same should be near an opened window, the shield being rcmovable.

Pivoted to the platform 10, at the end opposite the nozzle 12, is a dog 27 to engage the lever 15 if it is desired to maintain a continuous flame.

In Figure 2, a square post 28 is removably engaged with the lever 15 at dilierent points along its length and has at its upper end a support plate 29 adapted to support the hand of an operator holding a ladle, spatula or other similar work-part as indicated by the broken lines, the hand resting on the plate 529 and holding it in its lowered position.

Thus it may be seen that the mere weight of an operators hand resting on the support 29 will cause the lever 15 to move downwardly, thus opening the cock 1% allowing the gas to flow to the top of the burner where it will become ignited, due to the pilot light 21.

In Figure 3, asupport frame is shown as composed of a pair of metal skeleton elements 30 riveted together to "form spring clamps 31 slidable on the lever 15, the upper end of the frame elements being shaped to present a pair of spring clips 32 adapted to receive the stem or rod of a conventional soldering iron 33 or a holder for a melting pot handle as indicated at 34.

In this view the spring 16 is strong enough to overcome the weight of the work frame, but as soon as a work-part is placed on the frame, the lever is depressed and the gas thus allowed to flow and become ignited.

Thus it may be seen that a novel device has been disclosed whereby economy of fuel in a work-room or laboratory is attained and also whereby a work-room will not become overheated, the air vitiated and therefore uncomiortable.

An alternative form of burner is shown in Figure 1 comprising a hollow globular body 35 suited to engage the end of the inlet pipe 13 to receive gas to be ignited at the opposite, upper end.

A pan 36 is supported by bridges 37 within the body clear of its walls and so disposed as to provide an annular space for the passage of gas, and extending through the Wall of the body and pan are one or more drain pipes 38 by which melted wax and the like are carried outwardly, this device positively preventing clogging of the gas passages as any material inadvertently entering the body, through its open upper opening, is received in the pan.

A support 39 extending from the body 35 is provided for the pilot pipe 19, thus retaining it in proper proximity.

While certain preferred embodiments of this device have been shown and described, it will be understood that changes in the form, arrangements, proportions, sizes and details thereof may be made without departing from the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In combination with a portable heater having a valve, of a capped tubular post fixed on said heater, a lever fixed on the stem of said valve and passing transversely through the post to control the flow of the heating medium, means on the free end of said lever to receive a Weight, and means in said post to normally raise said lever upon removal of the weight whereby the valve is closed.

2. In combination with a portable heater having a base and a control valve, of a hollow post fixed on the base, of a lever fixed in the stem of said valve and passing through the post adapted to control the flow of the heating medium by actuation of said valve, said lever being depressible, a spring in said post to normally raise said lever, and means on said post to limit the rise of said lever. 7

3. In combination with a heater having means for controlling the flow of heat, a sectional lever fixed on said control means, a hinge connecting the lever sections whereby the outer section can be swung laterally, a guide for said sections, means in said guide to normally raise the sections, and a workpart support adjustably carried by the outer section longitudinally thereof.

4. In combination with a heater comprising a body having means for controlling the flow of heat, a hingedly connected sectional lever having one section fixed to the control means, and the other to swing in the plane of the first section, a work support on the second section, a guide for said lever, a spring to raise the lever, and a clip on said body to engage the lever when in a downward position.

Signed at New York, in the county of New York and State of New York, this 21st day of August, A. D. 1926.

MILTON M. KOHN. 

